Hebrew is my native language. I exprot to PDF - file-adobe pdf preset and choose one of the option to c the file as pdf. For now I'm using the smalest size for reviewing only. Some of the letters on the right side only duplicates itself. no metter what fonts I use. I tried several to be sure it's not a font problem. I'm using PDF reader

This is just an idea, but have you tried creating a PDF preset and enabling the "Embed All Fonts" checkbox? I don't have much experience with languages other than English but by default, only a subset of the font gets embedded. This is usually desired but in your case maybe enabling the checkbox will make a difference.

I'm afraid I've run through my troubleshooting tricks. Perhaps others have some ideas.

The problem is that you're using a foreign language version of an old version of the program that none of us have access to. You're out of the range of getting support from Adobe, I'm afraid, because of the age of your application.

5-1/2 years old. Not old for some things. Old for software, I'm afraid. Adobe only provides forum support, meaning people like me (I'm a volunteer). I don't have CS5 any more, nor do I have a Hebrew version which makes it hard to help, sorry.